gem error: (Errno::EACCES) Permission denied

Hi

I am installing canvasLms on Ubuntu .In this installation ruby 1.9.1 and gem and bundler installation is required . 1) I was install ruby 1.9.1 it is installed successfully. 2)After i am installing gem it is installed sudo gem install bundler --version 1.3.5 it is installed but when i installed with out sudo it shows error : gem error: (Errno::EACCES) Permission denied . 2) when i install #sudo bundle install --path vendor/bundle --without=sqlite It gives error.

bundler:Gem file not found please give me what's a solution .please give me any suggestion

  Thanking you